Improvement in plows



G. A. ,WALKER.

PLOW.

No. 31,684. I Patented Mar. 12, 1861.

UNITED STATES PATENT OFFICE.

GEO. A. WALKER, 0F ANNVLL'ITE, PENNSYLVANIA.

. lM"PROVEMENT IN PLOWS.

Specification forming part of Letters Patent No. 31,684, dated March 12, 1861.

To all whom it may concern:

Be it known that I, GEO. A. WALKER, of Annviile, in the county of Lebanon and State of Pennsylvania, have invented a new and Im-' proved Mode of Securing or Fastening the Point on the Self-SharpeningPlow; and I do hereby declare that the following is a full, clear, and exact description ofthe construction of the sar'ne, reference being bad to the accompanying drawings, forming part of this specification, in which--- Figure 1 is a perspective view of the plow.

B, Figs. 1 and 3, is the point, whichmay be' constructed of either cast or wrought iron.'

G is the shank of the point,-ot"taper form.

The u pper'and lower surfaces ofthe shank are concave. The upper surface is'seen in Fig. 3,

which figure give a very good idea of the form andconstruction ofthe point. I

t Fig. 2 is a land side view of the plow, andshows the recess or opening D, which is in it for the purpose of receiving the shank 0 of the point; It will be seen that the recess is of taper form, corresponding with the shank. d d are the upper and lower surfaces of the re cess. These are convex, (seen more particular- .ly in Fig. 4,) and when the shank is fitted in the recess the convex surfaces of the recess fit in theconcave surfaces of the shank. This will be readily seen by referring toFigs. 1, 2, 3, and'4. It will of. course be understood that the shank enters the front of the recess when being inserted. g

All lateral or side motion of the point B is avoided by the above arrangement, and the point cannot wearloose and shackling, which is generally the case when it is attached by bolts. When one side of the-point istvorrr'itmay be reversed, the side that'was undermost being placed uppermost. As the shank C fits in the recess 1) either way, itis thus a selt sharpen .ing plow, and the expeditious manner in which thepoint can be reversed, as also the secure manner in which it is attached to the p1ow, is an item which would give the invention the preference'over those in use.

The next important result attained, however,

bythis arraugementof plow-point is that the side of the point is always in the same plane as the face of the landside, thereby avoiding all projections and irregularities which might interfere with the free working of the plow.

I do not desire to claim,broadly a detachable plow-point having a tapering shank fittin g into a tapering recess; but

I claim as my invention and desire to secure by Letters Patent-- The arrangement of the detachable and reversible plow-point B with landside-recess D, said point having a tapering shank c, with concave upper and lower edges d d,'aud being otherwise constructed as herein described.

GEO. A. WALKER.

Witnesses:

HENRY SHERTZER, ALFREDYGARL. 

